TW593736B - Method of forming a thin film using atomic layer deposition - Google Patents
Method of forming a thin film using atomic layer deposition Download PDFInfo
- Publication number
- TW593736B TW593736B TW090114867A TW90114867A TW593736B TW 593736 B TW593736 B TW 593736B TW 090114867 A TW090114867 A TW 090114867A TW 90114867 A TW90114867 A TW 90114867A TW 593736 B TW593736 B TW 593736B
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- Taiwan
- Prior art keywords
- reactor
- predetermined pressure
- reactant
- pressure
- chemically adsorbed
- Prior art date
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- 238000000231 atomic layer deposition Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 83
- 239000010409 thin film Substances 0.000 title claims abstract description 15
- 239000000376 reactant Substances 0.000 claims abstract description 107
- 239000000758 substrate Substances 0.000 claims abstract description 44
- 235000012431 wafers Nutrition 0.000 claims description 25
- 238000010790 dilution Methods 0.000 claims description 16
- 239000012895 dilution Substances 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 13
- 239000010936 titanium Substances 0.000 claims description 12
- 239000011261 inert gas Substances 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 11
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- -1 Ya3N5 Chemical compound 0.000 claims description 3
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 3
- 150000004767 nitrides Chemical group 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910003781 PbTiO3 Inorganic materials 0.000 claims description 2
- 229910004200 TaSiN Inorganic materials 0.000 claims description 2
- 229910008482 TiSiN Inorganic materials 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910008807 WSiN Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 229910052792 caesium Inorganic materials 0.000 claims description 2
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims description 2
- 229910052741 iridium Inorganic materials 0.000 claims description 2
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- 229910052745 lead Inorganic materials 0.000 claims description 2
- 229910052914 metal silicate Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 2
- 240000000560 Citrus x paradisi Species 0.000 claims 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims 1
- 238000005034 decoration Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 claims 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims 1
- 238000004140 cleaning Methods 0.000 description 25
- 238000005516 engineering process Methods 0.000 description 16
- 239000010408 film Substances 0.000 description 13
- 239000010410 layer Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 230000002079 cooperative effect Effects 0.000 description 5
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910007245 Si2Cl6 Inorganic materials 0.000 description 1
- 229910003915 SiCl2H2 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- LXEXBJXDGVGRAR-UHFFFAOYSA-N trichloro(trichlorosilyl)silane Chemical compound Cl[Si](Cl)(Cl)[Si](Cl)(Cl)Cl LXEXBJXDGVGRAR-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/20—Deposition of semiconductor materials on a substrate, e.g. epitaxial growth solid phase epitaxy
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- H—ELECTRICITY
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/0228—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
- C23C16/345—Silicon nitride
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45544—Atomic layer deposition [ALD] characterized by the apparatus
- C23C16/45546—Atomic layer deposition [ALD] characterized by the apparatus specially adapted for a substrate stack in the ALD reactor
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
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- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02142—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing silicon and at least one metal element, e.g. metal silicate based insulators or metal silicon oxynitrides
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02164—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon oxide, e.g. SiO2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02197—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides the material having a perovskite structure, e.g. BaTiO3
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/3141—Deposition using atomic layer deposition techniques [ALD]
- H01L21/3142—Deposition using atomic layer deposition techniques [ALD] of nano-laminates, e.g. alternating layers of Al203-Hf02
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/318—Inorganic layers composed of nitrides
- H01L21/3185—Inorganic layers composed of nitrides of siliconnitrides
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- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
- Y10T117/10—Apparatus
- Y10T117/1004—Apparatus with means for measuring, testing, or sensing
- Y10T117/1008—Apparatus with means for measuring, testing, or sensing with responsive control means
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- Chemical Vapour Deposition (AREA)
- Formation Of Insulating Films (AREA)
Abstract
Description
593736 經濟部中央標隼局員工消費合作社印製 A7 B7 五、發明説明(1 ) 發明背景 1 ·發明領域 本發明有關半導體裝置之領域,尤其有關使用原子層沉 積(ALD)形成半導體裝置之薄膜的方法。 2·相關技藝描述 於技藝界高度積合半導體裝置中形成薄膜需要許多嚴格 之製造要求,諸如低熱預算、優越之階度覆蓋性、準確之 薄膜厚度控制、單純之程序變數、及低微粒污染。 習用以化學氣相沉積CVD爲主之方法諸如低壓化學氣相 沉積(LPCVD)、電漿增強化學氣相沉積(pECVD)不再適於 在符合製造需求的情況下於技藝界裝置中形成薄膜。例 如,於典型CVD方法中,薄膜係於相對高溫下沉積。此非 所期望狀況,因爲對該裝置具有負面熱影響之機率。而 且,該CVD薄膜經常具有缺點諸如不均勻之厚度,即厚度 沿著裝置表面而變化或微粒污染。 就LPCVD而言,LPCVD薄膜之氫含量通常相當高,其階 度覆蓋性經常令人無法接受。 已提供該原子層沉積(ALD)方法以作爲該習用薄膜形成 技術之備擇方法,因爲該ALD方法可於低於習用以CVD爲 主之方法的溫度下進行,亦具有優越之階度覆蓋性。 其中一個該種ALD方法技術係揭示於美國專利第 6,124,158號中。此情況下,導入第一種反應物,以與經處 理之表面進行反應,以形成反應物質之經鍵結單層。導入 第二種反應物,以與該表面進行反應,而形成所需之薄 -4- 本紙張尺度適用中國國家標準(CNS > M規格(210x297公釐) - ϋ^— m n—^ ml Halt i· I (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部中央標準局員工消費合作社印製 593736 A7 ____B7 五、發明説明(2 ) 膜。該周期的每個步驟之後,該反應槽皆使用惰性氣體清 洗,以防止除表面上以外之處進行反應。該反應物之提供 及Μ洗奴係於相同壓力下進行,因爲製造設備之保持性 的因素。 然而,該種習用之ALD技術亦具有數項缺點,諸如因爲 諸如原子層之相對低生長速率之問題所致之低通量。此 外’習用ALD反應器諸如移動式波型反應器之反應空間係 設計成極小,以減少用以清洗副產物等之清洗體積。因 此,習用ALD反應器僅於各個操作中處理一或兩個晶圓, 一般係於單一反應器中的一個操作中處理一基材。該項缺 點使得許多習用ALD技術難以實際應用及於工業上可接受 地大量生產。 近來,已進行數項嚐試,以增加該ALD方法的通量。其 中一項嚐試係揭示於美國專利第6,042,652號中。此情況 下,該ALD反應器係包括許多模組及許多反應空間(階 段),即由許多經組裝之模組所分隔之空間。例如,低模 組係置於一頂模組之下方,以於其間產生一反應空間(一 階段),其僅能容裝單一半導體基材。 然而,因爲各個反應2間(階段)小且被分隔,即彼此隔 離,故各基材係逐一嵌入該反應空間(階段)中之一中。因 此,難以採用自動化晶圓輸送機構以裝載/卸除該多個晶 圓。結果,装載/卸除晶圓花費相當長之時間。而且,^ 裝載及處理之晶圓數目仍不足。 疋故,顯然為要一種可得到高通量的新穎ALd方法,其 -5- i紙張尺度適用中國國家標準(CNS〉Α4規格(21〇χ297公廣) ' --- (請先閲讀背面之注意事項再填寫本頁) •裝- 訂 經濟部中央標準局負工消费合作社印製 593736 A7 _B7_____ 五、發明説明(3 ) 可解決前述問題,同時仍提供高品質薄膜。 發明概述 本發明提出一種使用原子層沉積(ALD)以形成薄膜的方 法。提供一種具有單一反應空間之反應器。同時將一批基 材裝置於該反應器之單一反應空間中。 之後,將含有氣體之反應物導入該單一反應空間中,部 分該反應物化學吸附於位在該單一反應空間内之該批基材 或晶圓的頂面上。隨之,自該單一反應空間移除非化學性 吸附之反應物。 根據本發明之一具體實例,在導入含有氣體之反應物之 後,該非化學性吸附之反應物於該單一反應空間中經稀 釋,以助於移除非化學性吸附之反應物。 而且,根據本發明另一具體實例,揭示一種形成薄膜之 方法’其中反應器係備有單一反應空間。將m屋二各 具有處理表面…導入該反應空間中。該多個晶圓之處理表 面基本上係面向同一取向。將第一種反應物導入該反應空 間中’使得該第一種反應物部分化學吸附於供Ald使用之 多個晶圓之處理表面上。之後,自該反應空間移除該第一 種反應物之非化學性吸附部分。其次,將第二種反應物導 入該反應空間中。而且,該第二種反應物係部分化學吸附 於該多個晶圓之各晶圓的處理表面上。之後,自該反應空 間移除該第二種反應物之非化學吸附部分。 二 由以下本發明參照附圖進行之較佳具體實例的詳述,可 進一步明瞭本發明之前述及其他目的、特色及優點。 -6 - 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公| ) (請先閲讀背面之注意事項再填寫本頁) -裝 593736 經濟部中央標準局員工消費合作社印製 A7 ----_____ B7五、發明説明(4 ) 圖式簡單説明 圖1係爲本發明之—具體實例的ALD反應器的示意剖面 圖0 圖2係爲本發明之—具體實例之ALD的各個步驟中,説明 ALD反應器之壓力的圖。 圖3A· 3D係説明本發明之一具體實例形成ald薄膜的程 序步驟。 圖4係爲説明本發明之一具體實例的程序條件的圖。 圖5係爲説明根據本發明之一具體實例所進行之ALD方法 的結果之圖。 圖6係爲説明根據本發明之一具體實例進行之ALD方法的 結果之圖。 詳細描述 本發明大體上在於一種藉ALD技術製造薄膜之方法,經 由該方法使通量較習用ALD技術大幅增高。 下文描述中’陳列許多特定之細節,以充分明瞭本發 明。然而’一般熟習該項技術者應已知本發明可在排除此 等特定細節的情況下進行。在部分情況下,並未詳細出示 眾所周知之程序步驟及技術,以避免模糊本發明之焦點。 下文中,描述本發明之一具體實例,一種使用ALD形成 薄膜的方法。 參照圖1,示意一種ALD反應器10,具有位於程序管11中 之單一反應空間12。反應器10之其他零件諸如加熱器被省 略以簡化説明。該ALD反應器10以爐型垂直反應器(垂直 本紙張尺度適用中國國家標準(CNS ) A4規格(21〇Χ297公釐) (請先閲讀背面之注意事項再填寫本頁) -裝. 訂593736 Printed by A7 B7, Consumer Cooperative of the Central Bureau of Standards, Ministry of Economic Affairs 5. Description of the Invention (1) Background of the Invention 1. Field of the Invention The present invention relates to the field of semiconductor devices, especially to the use of atomic layer deposition (ALD) to form thin films of semiconductor devices. method. 2. Description of related technologies Forming thin films in highly integrated semiconductor devices in the art world requires many stringent manufacturing requirements, such as low thermal budgets, superior step coverage, accurate film thickness control, simple process variables, and low particulate pollution. Chemical vapor deposition (CVD) -based methods such as low pressure chemical vapor deposition (LPCVD) and plasma enhanced chemical vapor deposition (pECVD) are no longer suitable for forming thin films in technical devices under manufacturing conditions. For example, in a typical CVD method, a thin film is deposited at a relatively high temperature. This is not an expected situation because of the chance of having a negative thermal impact on the device. Moreover, the CVD film often has disadvantages such as uneven thickness, i.e., thickness varies along the surface of the device or particulate contamination. As far as LPCVD is concerned, the hydrogen content of LPCVD films is usually quite high, and its degree of coverage is often unacceptable. The Atomic Layer Deposition (ALD) method has been provided as an alternative to the conventional thin film formation technology, because the ALD method can be performed at a temperature lower than the conventional CVD-based method, and also has excellent level coverage . One such ALD method technology is disclosed in U.S. Patent No. 6,124,158. In this case, the first reactant is introduced to react with the treated surface to form a bonded monolayer of the reactant. Introduce the second reactant to react with the surface to form the required thickness. -4- The paper size applies to Chinese national standards (CNS > M specification (210x297 mm)-ϋ ^ — mn— ^ ml Halt i · I (Please read the precautions on the back before filling this page) Order printed by the Consumers Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs to print 593736 A7 ____B7 V. Description of the invention (2) Membrane. After each step of the cycle, the reaction tank All are cleaned with an inert gas to prevent the reaction from occurring except on the surface. The supply of the reactants and the washing are performed under the same pressure because of the retention of manufacturing equipment. However, this conventional ALD technology It also has several disadvantages, such as low throughput due to issues such as the relatively low growth rate of the atomic layer. In addition, the reaction space of 'conventional ALD reactors, such as mobile wave reactors, is designed to be extremely small to reduce The cleaning volume of cleaning by-products, etc. Therefore, conventional ALD reactors only process one or two wafers in each operation, and generally process one in one operation in a single reactor. This shortcoming makes many conventional ALD techniques difficult to practically use and industrially acceptable for mass production. Recently, several attempts have been made to increase the throughput of the ALD method. One attempt was disclosed in US Patent No. No. 6,042,652. In this case, the ALD reactor includes many modules and many reaction spaces (stages), that is, a space separated by many assembled modules. For example, a low module is placed on a top module Underneath, a reaction space (one stage) is created between them, which can only accommodate a single semiconductor substrate. However, because each reaction 2 (stage) is small and separated, that is, isolated from each other, each substrate is one by one Embedded in one of the reaction spaces (stages). Therefore, it is difficult to use an automated wafer transfer mechanism to load / unload the plurality of wafers. As a result, it takes a considerable time to load / unload wafers. Also, ^ The number of wafers loaded and processed is still insufficient. Therefore, it is clear that a new ALd method that can obtain high throughput is adopted. Its -5- i paper size is applicable to Chinese national standards (CNS> Α4 specifications (21 (χ297 公 广) '--- (Please read the notes on the back before filling out this page) • Binding-Order printed by the Central Standards Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 593736 A7 _B7_____ 5. Description of the invention (3) can solve the aforementioned problems At the same time, high-quality films are still provided. SUMMARY OF THE INVENTION The present invention proposes a method for forming a film using atomic layer deposition (ALD). A reactor with a single reaction space is provided. A batch of substrates is installed in a single reactor. In the reaction space, a gas-containing reactant is introduced into the single reaction space, and a part of the reactant is chemically adsorbed on the top surface of the batch of substrates or wafers located in the single reaction space. Subsequently, non-chemically adsorbed reactants are removed from the single reaction space. According to a specific example of the present invention, after introducing a gas-containing reactant, the non-chemically adsorbed reactant is diluted in the single reaction space to help remove the non-chemically adsorbed reactant. Moreover, according to another embodiment of the present invention, a method of forming a thin film is disclosed 'wherein the reactor is provided with a single reaction space. Each of the two m houses has a treatment surface ... introduced into the reaction space. The processing surfaces of the multiple wafers are substantially oriented in the same orientation. Introducing the first reactant into the reaction space 'causes the first reactant to be partially chemically adsorbed on the processing surfaces of the plurality of wafers for use by Ald. Thereafter, the non-chemically adsorbed portion of the first reactant is removed from the reaction space. Second, a second reactant is introduced into the reaction space. Moreover, the second reactant system is partially chemically adsorbed on the processing surface of each of the plurality of wafers. Thereafter, the non-chemically adsorbed portion of the second reactant is removed from the reaction space. 2. The foregoing and other objects, features, and advantages of the present invention will be further clarified by the following detailed description of preferred embodiments of the present invention with reference to the accompanying drawings. -6-This paper size applies to Chinese National Standard (CNS) A4 (210X297) | (Please read the notes on the back before filling out this page)-Installed 593736 Printed by the Consumer Standards Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs --- -_____ B7 V. Description of the invention (4) Brief description of the drawings Figure 1 is a schematic sectional view of an ALD reactor of a specific example of the present invention 0 Figure 2 is of each step of the ALD of a specific example of the present invention, A diagram illustrating the pressure in an ALD reactor. Figs. 3A and 3D illustrate a procedure of forming an ald film according to a specific example of the present invention. FIG. 4 is a diagram illustrating program conditions of a specific example of the present invention. Fig. 5 is a graph illustrating the results of an ALD method according to a specific example of the present invention. Fig. 6 is a graph illustrating the results of an ALD method according to a specific example of the present invention. DETAILED DESCRIPTION The present invention is generally directed to a method for manufacturing a thin film by ALD technology, by which the throughput is greatly increased compared to the conventional ALD technology. Many specific details are shown in the description below to fully understand the present invention. However, one of ordinary skill in the art will recognize that the invention may be practiced without these specific details. In some cases, well-known procedures and techniques have not been shown in detail to avoid obscuring the focus of the present invention. Hereinafter, a specific example of the present invention is described, a method for forming a thin film using ALD. Referring to FIG. 1, there is shown an ALD reactor 10 having a single reaction space 12 in a process tube 11. As shown in FIG. Other parts of the reactor 10 such as a heater are omitted to simplify the description. The ALD reactor 10 is a furnace-type vertical reactor (vertical. The paper size applies the Chinese National Standard (CNS) A4 specification (21 × 297 mm). (Please read the precautions on the back before filling out this page).)
593736 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明(5 ) " ^ — 取向)爲佳’與美國專利第5,217,34〇號及第5,112,641號所 出示之習用LPCVD爐㈣。Μ,在本發明精神及範圍可 置換性地使用適於進行本發明之任何其他類型的反應器, 諸如水平取向者。 根據本發明,反應芝間丨2可意指置入基材丨5(或晶圓)且 發生ALD之各種程序的空間。而且,於本發明中,該單一 反應2間12並未分隔或隔離。此點異於習用反應器之反應 空間,諸如美國專利第6,〇42,552號及第ό,015,590號所出示 者,其中一 ALD反應器有多個(分隔)反應空間。此等習用 ALD反應器中,尤其是於美國專利第6,〇15,59〇號中,因爲 該多個(刀隔)反應空間各具有極狹有之剖面,以使得到清 洗效率之反應空間的體積縮至最小,可置於各個反應空間 中之基材數目極小,例如每個反應空間有一或兩個基材。 而且’因爲前述之結構限制,習用ALD反應器於此方面限 制了可置入反應器中之基材的總數。例如,美國專利第 6,〇42,652號所出示之形成各個反應空間的模組本身可於該 反應内聚得大量空間或體積。此等情況可大幅降低該ald 方法的通量。 然而,於本發明中,因爲該爐型ALD反應器10具有大型 體積單一反應空間12,而未經分隔,故該ALD反應器1〇中 可容納多於一百(1〇〇)片基材,如圖1所示。因此,—次 ALD操作所處理之基材數量大幅增加(大幅增加通量)。 處理上層形成有ALD薄膜之基材15時,實質同時地將一 批料14基材15置入該ALD反應器10之單一反應空間12中, (請先閲讀背面之注意事項再填寫本頁) - - mi 1 m HI Γ_ mi *- i ·雪囂 Ϊ1Χ -I— JL· 訂 -8 - 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) 593736 經濟部中央標準局員工消費合作杜印製 A7 B7 五、發明説明(6 ) t圖1所t/本發明中,—批料14可意指置人該反應器10 進仃一單次ALD操作,以於該基材15上形成薄膜的基材 總數。根據本發明之一具體實例,該一批料14較佳係包含 約125- 135片基材。每片基材15皆具有處理表面口,以位 於其頂部爲佳。 本發月ALD方法中,在該基材丨5裝載/卸除期間,該基材 15批料14較佳係使用自動(即非手動)晶圓輸送機構18裝載 於ALD反應器10上爲佳,如圖"斤説明。該自動晶圓輸送 機構18可爲美國專利第5,217,34〇號及第5,U2,64i號所揭示 者。然而,在本發明精神及範圍内,可置換地使用適於進 行本發明之任何其他類型自動晶圓輸送機構。 換言之,於本發明中,因爲供單一 ALD操作使用之所有 產物基材15皆可置入單一反應空間12中,非分佈於一反應 器中之數個反應空間之間,故基材15之批料14的裝載/卸 除可自動且迅速地藉由晶圓輸送機構18完成。尤其,基材 15批料14係依預定方式排列,且嵌入舟皿19中。該舟孤 19-一般由石英或其他習用材料形成…之内表面上具有許 多溝槽,以容納各個基材15。裝有基材批料14之舟皿19置 入該ALD反應器1〇中,因此同時將基材15批料14裝載於該 ALD反應器10之單一反應空間12中,如圖1所示。此情況 下’該基材15之實質所有頂面17皆面向相同取向,以進行 自動化晶圓輸送。 此提供一重要之超越習用ALD技術諸如美國專利第 6,015,590號所揭示者之優點,尤其是通量,該習用技術中 -9- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) ^--h--------^裝丨| (請先閲讀背面之注意事項再填寫本頁) *11 593736 經濟部中央橾準局員工消費合作社印裝 Α7 Β7 五、發明説明(7) 晶圓頂面係面向不同取向,因此自動化晶圓輸送極爲麻煩 或不可能。因此,於習用ALD技術中,僅有少數基材,大 部分情況下係一個,可逐一置於各反應空間中。此因該基 材需分佈於反應器中之數個反應空間之間,而該分佈幾乎 不可能或完全無法完成。此對於美國專利第6,〇42,652號所 揭示之習用ALD技術而言亦然,其中多個圓形半導體基材 係逐一輸送至該反應空間(階段)中,如前文背景中所述。 此種整體裝載過程花費長周期時間,大幅降低通量,因此 限制該ALD方法的工業應用。 如圖3A所示,根據習用ALD技術之方式,第一反應物40 或含有氣體之第一反應物係導入(給料步驟)通過圖1之輸 入16,諸如ALD反應器1〇之氣體供料線(未示),而進入該 單一反應空間12。因此,該第一反應物40部分化學性吸附 (化學吸附)於該單一反應空間12内之基材15批料14的處理 表面17上。如圖2所示,給料步驟31以於第一預定壓力P1 下進行爲佳,介於約〇·1托耳及约0.5托耳之間。 另一方面,於本發明中,爲了進一步增加ALD之通量, ALD之清洗時間需縮短。此因該清洗時間通常係視反應器 之體積而定。因爲本發明採用具有大型體積之爐型反應 器,故清洗體積實質上大於習用ALD技術,諸如美國專利 第6,042,552號或第6,015,590號所示之移動式波型裝置。 爲解決此項問題,根據本發明之一具體實例,在導入該 第一反應物40以有效地縮短清洗時間之後,該第一反應物 40之非化學吸附部分係於自ALD反應器1〇移除該第一反應 -10- 本紙張尺度適用中國國家標準(CNS ) Α4規格(210 X 297公釐) (請先閲讀背面之注意事項再填寫本頁)593736 Printed by the Consumer Standards Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs A7 B7 V. Description of invention (5) " ^ — Orientation is better 'and the conventional LPCVD furnace shown in US Patent Nos. 5,217,340 and 5,112,641 Alas. M, within the spirit and scope of the present invention, any other type of reactor suitable for carrying out the present invention may be used interchangeably, such as a horizontally oriented one. According to the present invention, the reaction cell 2 may mean a space in which a substrate 5 (or a wafer) is placed and various procedures of ALD occur. Moreover, in the present invention, the single reaction 2 to 12 is not separated or isolated. This point is different from the reaction space of conventional reactors, such as those shown in U.S. Patent Nos. 6,042,552 and 6,015,590, in which one ALD reactor has multiple (separated) reaction spaces. In these conventional ALD reactors, especially in US Pat. No. 6,015,590, the plurality of (knife-separated) reaction spaces each have extremely narrow cross-sections, so that the reaction space to the cleaning efficiency is achieved The volume is reduced to a minimum, and the number of substrates that can be placed in each reaction space is extremely small, such as one or two substrates in each reaction space. And because of the aforementioned structural limitations, the conventional ALD reactor in this respect limits the total number of substrates that can be placed in the reactor. For example, the module forming each reaction space shown in U.S. Patent No. 6,042,652 itself can accumulate a large amount of space or volume within the reaction. These conditions can significantly reduce the throughput of the ald method. However, in the present invention, because the furnace-type ALD reactor 10 has a large-volume single reaction space 12 without partitioning, the ALD reactor 10 can accommodate more than one hundred (100) substrates. ,As shown in Figure 1. As a result, the number of substrates processed in one ALD operation has increased significantly (significantly increased throughput). When processing the substrate 15 with the ALD film formed on the upper layer, a batch of the substrate 14 is placed into the single reaction space 12 of the ALD reactor 10 at the same time. (Please read the precautions on the back before filling this page) --mi 1 m HI Γ_ mi *-i · XuehuoΪ1 × -I— JL · Order-8-This paper size applies to China National Standard (CNS) A4 (210X297 mm) 593736 Employees ’cooperation with the Central Standards Bureau of the Ministry of Economic Affairs Du printed A7 B7 V. Description of the invention (6) t Figure 1 t / In the present invention,-batch 14 can mean that the reactor 10 is put into a single ALD operation on the substrate 15 The total number of substrates forming the film. According to a specific embodiment of the present invention, the batch 14 preferably comprises about 125 to 135 substrates. Each of the substrates 15 has a treatment surface opening, preferably on the top thereof. In this month's ALD method, during the loading / unloading of the substrate 5, the batch 15 of the substrate 14 is preferably loaded on the ALD reactor 10 using an automatic (ie, non-manual) wafer transfer mechanism 18. As shown in the figure. The automatic wafer transfer mechanism 18 may be disclosed in U.S. Patent Nos. 5,217,340 and 5, U2,64i. However, within the spirit and scope of the present invention, any other type of automatic wafer transfer mechanism suitable for carrying out the present invention may be used interchangeably. In other words, in the present invention, because all the product substrates 15 for a single ALD operation can be placed in a single reaction space 12 and not distributed between several reaction spaces in a reactor, the batch of substrate 15 The loading / unloading of the material 14 can be performed automatically and quickly by the wafer transfer mechanism 18. In particular, the base material 15 batches 14 are arranged in a predetermined manner and embedded in the boat 19. The boat solitary 19-generally formed of quartz or other conventional materials ... has a plurality of grooves on its inner surface to accommodate each substrate 15. The boat 19 containing the substrate batch 14 is placed in the ALD reactor 10, so the substrate 15 batch 14 is simultaneously loaded into a single reaction space 12 of the ALD reactor 10, as shown in FIG. In this case, 'substantially all the top surfaces 17 of the substrate 15 face the same orientation for automated wafer transfer. This provides an important advantage over conventional ALD technologies, such as those disclosed in US Patent No. 6,015,590, especially the flux. The conventional technology in -9- this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ^-h -------- ^ Equipment 丨 | (Please read the notes on the back before filling in this page) * 11 593736 Printed by the Consumers' Cooperatives of the Central Government Bureau of the Ministry of Economic Affairs Α7 Β7 V. Description of the invention ( 7) The top surface of the wafer is oriented differently, so automated wafer transfer is extremely cumbersome or impossible. Therefore, in the conventional ALD technology, there are only a few substrates, most of which are one and can be placed in each reaction space one by one. This is because the substrate needs to be distributed between several reaction spaces in the reactor, and the distribution is almost impossible or completely impossible. This is also true for the conventional ALD technology disclosed in U.S. Patent No. 6,040,652, in which a plurality of circular semiconductor substrates are conveyed one by one into the reaction space (stage), as described in the background above. Such an overall loading process takes a long cycle time, which greatly reduces the throughput, thus limiting the industrial application of the ALD method. As shown in FIG. 3A, according to the conventional ALD technology, the first reactant 40 or the first reactant system containing gas is introduced (feeding step) through the input 16 of FIG. 1, such as the gas supply line of the ALD reactor 10 (Not shown) and enter the single reaction space 12. Therefore, the first reactant 40 is partially chemically adsorbed (chemically adsorbed) on the processing surface 17 of the substrate 15 batch 14 in the single reaction space 12. As shown in FIG. 2, the feeding step 31 is preferably performed at a first predetermined pressure P1, which is between about 0.1 Torr and about 0.5 Torr. On the other hand, in the present invention, in order to further increase the flux of ALD, the cleaning time of ALD needs to be shortened. This is because the cleaning time usually depends on the volume of the reactor. Because the present invention uses a furnace-type reactor having a large volume, the cleaning volume is substantially larger than a conventional ALD technology, such as a mobile wave device shown in U.S. Patent No. 6,042,552 or 6,015,590. To solve this problem, according to a specific example of the present invention, after introducing the first reactant 40 to effectively shorten the cleaning time, the non-chemically adsorbed portion of the first reactant 40 is moved from the ALD reactor 10 In addition to this first reaction-10- This paper size applies Chinese National Standard (CNS) Α4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page)
經濟部中央標準局員工消費合作社印製 593736 A7 B7______ 五、發明説明(8 ) 物40之非化學吸附部分之前,於該單一反應空間12中稀 釋。此情況下,該第一反應物40之非化學吸附部分係包括 物理性吸附(物理吸附)之反應物,即第一反應物40物理性 吸附於且鬆弛地保持於該第一反應物40之化學吸附部分上 或位於該ALD反應器10内之任何殘留反應性物質上。 就圖2之稀釋步驟33而言,圖1所示之ALD反應器10係包 括連接於排氣管25或粗加工管之壓力控制閥21,以自該 ALD反應器10移除該第一反應物40之經稀釋非化學吸附部 分。該排氣管25係連接於泵23,以自該反應器10卸除該第 一反應物40的非化學吸附部分。於該稀釋步驟33期間,控 制閥21實質關閉,惰性氣體經由輸入16提供於該反應器10 中,而該第一反應物40導入該ALD反應器10之過程實質停 止。即,ALD反應器10之排氣管25的傳導降低。 或於稀釋步驟33期間,將含量實質高於第一反應物40之 量的惰性氣體導入該ALD反應器1〇中,同時終止將該第一 反應物40導入該反應器10中。 如圖2所示,較佳係於該第一反應物4〇之非化學吸附部分 的稀釋期間,該反應器壓力自第一預定潘力P1增加至第二 預定壓力P2,因此該第二預定壓力P2係高於該第一預定壓 力P1。該第二預定壓力P2以較該第一預定壓力P1高約15倍 爲佳。 此等步驟使得該反應器10中之第一反應物4〇的非化學吸 附部分於短時間内被稀釋,例如數秒鐘内,因此在與習用 ALD技術比較之下,清洗步驟32之整體清洗時間及清洗效 -11 - 本紙張尺度適用中國國家標準(CNS ) A4規格(210^7^57 (請先閲讀背面之注意事項再填寫本頁) * ϋ— muPrinted by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 593736 A7 B7______ V. Description of Invention (8) The non-chemically adsorbed part of substance 40 is diluted in this single reaction space 12. In this case, the non-chemically adsorbed portion of the first reactant 40 includes a physically adsorbed (physically adsorbed) reactant, that is, the first reactant 40 is physically adsorbed and held loosely in the first reactant 40. On the chemisorption portion or on any remaining reactive species within the ALD reactor 10. As for the dilution step 33 in FIG. 2, the ALD reactor 10 shown in FIG. 1 includes a pressure control valve 21 connected to the exhaust pipe 25 or a roughing pipe to remove the first reaction from the ALD reactor 10. The diluted non-chemically adsorbed portion of the product 40. The exhaust pipe 25 is connected to a pump 23 to remove the non-chemically adsorbed portion of the first reactant 40 from the reactor 10. During the dilution step 33, the control valve 21 is substantially closed, the inert gas is provided in the reactor 10 through the input 16, and the process of introducing the first reactant 40 into the ALD reactor 10 is substantially stopped. That is, the conduction of the exhaust pipe 25 of the ALD reactor 10 is reduced. Or, during the dilution step 33, an inert gas having a content substantially higher than that of the first reactant 40 is introduced into the ALD reactor 10, and the introduction of the first reactant 40 into the reactor 10 is terminated at the same time. As shown in FIG. 2, preferably during the dilution period of the non-chemically adsorbed portion of the first reactant 40, the reactor pressure is increased from the first predetermined Pan force P1 to the second predetermined pressure P2, so the second predetermined The pressure P2 is higher than the first predetermined pressure P1. The second predetermined pressure P2 is preferably about 15 times higher than the first predetermined pressure P1. These steps allow the non-chemically adsorbed portion of the first reactant 40 in the reactor 10 to be diluted in a short time, such as within a few seconds. Therefore, compared with the conventional ALD technology, the overall cleaning time of the cleaning step 32 And cleaning effect-11-This paper size applies to China National Standard (CNS) A4 specifications (210 ^ 7 ^ 57 (please read the precautions on the back before filling this page) * ϋ— mu
*1T 經濟部中央標準局員工消費合作社印製 593736 A7 B7_ 五、發明説明(9 ) 率大幅降低。此種稀釋過程大幅降低該ALD反應器1〇中第 一反應物40的非化學吸附部分之分壓。因此,在移除該第 一反應物40之非化學吸附部分之後,因爲反應物4〇已被稀 釋,故僅有極少量之第一反應物40的非化學吸附部分殘留 於該反應器10中,因此使清洗效率最大化。而且,因爲該 第一反應物40被稀釋,故可有效地防止該第一反應物4〇之 間之相互混合。 而且,如圖3B所示,該第一反應物40之經稀釋非化學吸 附部分於導入第二反應物42(給料步驟35)之前自該單一反 應空間12移除(抽空)該第一反應物40的經稀釋非化學吸附 部分,以藉化學交換形成圖3D所需之ALD薄膜44。故該第 一反應物40之非化學吸附部分的移除以使用泵23泵抽該反 應器10進行爲佳,以降低該反應器10之壓力至第三預定壓 力P3 (參照圖2)。該第三預定壓力P3係低於給料步驟31的 第一預定壓力P1。較佳係該第三預定壓力P3係較該第一預 定壓力P1低約0.5倍。 此步驟中,該壓力降低該第三預定壓力P3的過程可藉著 停止或減少該惰性氣體之導入及開啓控制閥21而完成。 即,排氣管線之傳導增加。 現在參照圖3C,該第二反應物42係導入該反應空間12 中,因此,該第二反應物42部分化學吸附於該基材15之批 料14的處理表面17上,以進行化學交換。當然,稀釋步驟 37以於該第二反應物42給料之後進行爲佳。 現在參照圖3D,該第二反應物42之非化學吸附部分使用 -12- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐) (請先閲讀背面之注意事項再填寫本頁) 装· 訂 593736 A7 _B7_._ 五、發明説明(1〇 ) 與前述在移除步驟34中施加於該第一反應物40者相同之方 法自該反應空間12移除(圖2之移除步驟38)。 前述導入該第一及第二反應物40,42及自反應空間12移 除該反應物40,42之非化學吸附部分的步驟可重複以達成 所需之薄膜厚度。 已知本發明所使用之清洗方法與反應物種類無關,因此 可用以形成各種ALD薄膜。該ALD薄膜有例如Al2〇3、 Ti02、Zr02、Hf02、Ta205、Nb205、Ce02、Y203、Si02、 ln203、Ru02或Ir02之氧化物層。其他實例如下:SrTi03、 PbTi03、SrRu03、CaRu03、(Ba,Sr)Ti03、Pb(Zr,Ti)03、 (Pb,La)(Zr,Ti)03、(Sr,Ca)Ru03、(Ba,Sr)Ru03、經 Sn摻 雜之In203(IT0)、經Fe摻雜之ln203、或經Zr摻雜之ln203之 複合氧化物層;SiN、NbN、ZrN、TiN、TaN、Ya3N5、 AIN、GaN、WN、或 BN 之氮化物層;WBN、WSiN、 TiSiN、TaSiN或 AlTiN之複合·氮化物層;Si、A卜 Cu、Ti、 Ta、Mo、Pt、Ru、Rh、Ir、W或 Ag之金屬層;A1、W、Ti或 Co之矽化物層;及金屬矽酸鹽材料(MuSixOJ。其中,金 屬,’M” 可爲铪(Hf)、錘(Zr)、妲(Ta)、鈦(Ti)、铯(Cs)或 鋁(A1)。熟習該項技術者已知該列示不具獨佔性及排他 性,絕不7艮制本發明之範圍。 實施例1* 1T Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 593736 A7 B7_ V. Description of invention (9) The rate has been significantly reduced. This dilution process greatly reduces the partial pressure of the non-chemically adsorbed portion of the first reactant 40 in the ALD reactor 10. Therefore, after the non-chemically adsorbed portion of the first reactant 40 is removed, only a small amount of the non-chemically adsorbed portion of the first reactant 40 remains in the reactor 10 because the reactant 40 has been diluted. , Thus maximizing cleaning efficiency. Moreover, since the first reactants 40 are diluted, it is possible to effectively prevent the first reactants 40 from being mixed with each other. Moreover, as shown in FIG. 3B, the diluted non-chemically adsorbed portion of the first reactant 40 is removed (evacuated) from the single reaction space 12 before being introduced into the second reactant 42 (feeding step 35). The diluted non-chemically adsorbed portion of 40 is used to form the ALD film 44 required by FIG. 3D by chemical exchange. Therefore, it is better to remove the non-chemically adsorbed portion of the first reactant 40 by using the pump 23 to pump the reactor 10 to reduce the pressure of the reactor 10 to a third predetermined pressure P3 (refer to FIG. 2). The third predetermined pressure P3 is lower than the first predetermined pressure P1 in the feeding step 31. Preferably, the third predetermined pressure P3 is about 0.5 times lower than the first predetermined pressure P1. In this step, the process of reducing the pressure by the third predetermined pressure P3 can be completed by stopping or reducing the introduction of the inert gas and opening the control valve 21. That is, the conductance of the exhaust line increases. Referring now to FIG. 3C, the second reactant 42 is introduced into the reaction space 12, so that the second reactant 42 is partially chemically adsorbed on the processing surface 17 of the batch 14 of the substrate 15 for chemical exchange. Of course, the dilution step 37 is preferably performed after the second reactant 42 is fed. Referring now to FIG. 3D, the non-chemically adsorbed portion of the second reactant 42 is used. -12- This paper size applies to China National Standard (CNS) A4 specifications (210X297 mm) (Please read the precautions on the back before filling this page) Binding · Order 593736 A7 _B7 _._ 5. Description of the invention (10) The same method as that applied to the first reactant 40 in the removing step 34 is removed from the reaction space 12 (the removing step of FIG. 2) 38). The aforementioned steps of introducing the first and second reactants 40, 42 and removing the non-chemically adsorbed portion of the reactants 40, 42 from the reaction space 12 may be repeated to achieve a desired film thickness. It is known that the cleaning method used in the present invention is independent of the kind of the reactant, and thus can be used to form various ALD films. The ALD film has, for example, an oxide layer of Al203, Ti02, Zr02, Hf02, Ta205, Nb205, Ce02, Y203, Si02, In203, Ru02, or Ir02. Other examples are as follows: SrTi03, PbTi03, SrRu03, CaRu03, (Ba, Sr) Ti03, Pb (Zr, Ti) 03, (Pb, La) (Zr, Ti) 03, (Sr, Ca) Ru03, (Ba, Sr ) Ru03, Sn-doped In203 (IT0), Fe-doped ln203, or Zr-doped ln203 composite oxide layer; SiN, NbN, ZrN, TiN, TaN, Ya3N5, AIN, GaN, WN Or nitride layer of BN; WBN, WSiN, TiSiN, TaSiN, or AlTiN compound / nitride layer; Si, AB, Cu, Ti, Ta, Mo, Pt, Ru, Rh, Ir, W, or Ag metal layer ; Silicide layers of A1, W, Ti or Co; and metal silicate materials (MuSixOJ. Among them, the metal, 'M' can be hafnium (Hf), hammer (Zr), hafnium (Ta), titanium (Ti) , Cesium (Cs) or aluminum (A1). Those skilled in the art know that the listing is not exclusive and exclusive, and will never make the scope of the present invention. Example 1
SiN薄膜係藉本發明ALD方法沉積。所使用之反應物係爲 藉遠距電漿(400瓦)活化之DCS (SiCl2H2)及NH3氣體。沉積 溫度係爲375°C。反應物之流速係DCS爲500 seem且NH3爲 -13- 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐) 593736 經濟部中央標隼局員工消費合作社印裝 A7 B7 五、發明説明(11 ) 2000 seem。在移除非化學吸附之反應物之前進行稀釋時, 將5000 seem之>12氣體導入反應器中。DCS供料、DCS清 洗、NH3供料及NH3清洗的各步驟之時間及壓力係列於表i 中,另外説明於圖4中。而且,圖5係説明前述ALD方法的 結果。 表1 項目 DCS給料 DCS清洗 NH3給料 NH3清洗 稀釋 移除 稀釋 移除 壓力 <0.1— 2.0 2.0— >10-> <0.1— 0.25 0.25—> >10— (托耳) 2.0 >10 <0.1 0.25 >10 <0.1 時間(秒) 7.5 10 4 6 1.5 10 4 6 則述ALD方法之生長速率係爲i埃/周期,得到良好之 ALD處理特性。 此外,已發現不使用本發明清洗方法時,會產生以下問 通。首先,若使用惰性氣體諸如Ar或N2於與反應物給料步 驟相同之壓力下進行清洗步驟,則反應器中可保留實質量 之惰性氣體。降低該反應物之分壓。是故,增加後續給料 步驟之反應物給料時間。此外,該清洗時間亦增加。其 /人’右該、’目洗係僅藉著果抽進行-如同本發明之一且體實 例般地,在泵抽之前未進行稀釋_則該泵抽花費明顯較長 時間。 實施例2 HCD(Si2Cl6)儲存於室溫下,使用5〇〇 sccmiN2氣體作爲載 體氣體而導入反應器中。之後,該清洗係藉著使用5〇〇〇 sccm -14 本紙張尺度適用中國國家標準(CNS ) A4規格(210X 297公釐) (請先閲讀背面之注意事項再填寫本頁)The SiN film is deposited by the ALD method of the present invention. The reactants used were DCS (SiCl2H2) and NH3 gas activated by remote plasma (400 watts). The deposition temperature is 375 ° C. The flow rate of the reactants is 500 seem with DCS and -13 with NH3. This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) 593736 Printed by the Consumer Cooperatives of the Central Standardization Bureau of the Ministry of Economic Affairs. (11) 2000 seem. When diluting before removing non-chemically adsorbed reactants, 5000 seem > 12 gas was introduced into the reactor. The time and pressure series of each step of DCS feeding, DCS cleaning, NH3 feeding and NH3 cleaning are shown in Table i, and they are also described in FIG. 4. Moreover, Fig. 5 illustrates the results of the aforementioned ALD method. Table 1 Items DCS feed DCS cleaning NH3 feed NH3 cleaning dilution removal dilution removal pressure < 0.1- 2.0 2.0- > 10- > < 0.1- 0.25 0.25- > > 10- (Torr) 2.0 > 10 < 0.1 0.25 > 10 < 0.1 Time (seconds) 7.5 10 4 6 1.5 10 4 6 Then the growth rate of the ALD method is i Angstrom / period, and good ALD processing characteristics are obtained. In addition, it has been found that when the cleaning method of the present invention is not used, the following problems arise. First, if an inert gas such as Ar or N2 is used to perform the cleaning step at the same pressure as the reactant feeding step, a solid mass of the inert gas can be retained in the reactor. Reduce the partial pressure of the reactants. Therefore, increase the reactant feeding time in the subsequent feeding step. In addition, the cleaning time is increased. It is only by fruit pumping-like one of the present invention and, as a practical example, that no dilution is performed before pumping-the pumping takes significantly longer. Example 2 HCD (Si2Cl6) was stored at room temperature and introduced into a reactor using 500 sccmiN2 gas as a carrier gas. After that, the cleaning was performed by using 5000 sccm -14. This paper size is applicable to China National Standard (CNS) A4 (210X 297 mm) (Please read the precautions on the back before filling this page)
訂 593736 經濟部中央榡準局員工消費合作衽印製 A7 B7五、發明説明(12) < %氣體稀釋非化學吸附反應物,之後自該反應器泵除 (移除)該非化學吸附反應物而進行。其次,提供2〇〇〇 sccm 之遠距電漿(400瓦)NH3,藉5000 sccmiN2氣體稀釋非化學 吸附反應物,之後自反應器泵除(移除)該非化學吸附反應 物,而完成該清洗。 此情況下,HCD係提供於該反應器歷經2〇秒。該反應器 壓力係自0.1托耳變成2托耳,之後保持於2托耳。清洗期間 之壓力係於稀釋步驟(4秒)中由2托耳變成1〇托耳,之後於 泵抽(6秒)中降低至〇.丨托耳。提供NH3(3(^>、)及泵抽(4+6 秒)係使用前述方式進行。圖6係説明前述ALD方法的結果。 生長速率係爲2.3埃/周期,而得到良好ALD處理特性。 前述本發明特性有部分如下: 1·給料步驟期間之反應器壓力及泵抽步驟期間者可相 異。 2·不同反應物於各給料步驟之反應器壓力可實質相同或 相異。 3.可發現泵抽步驟係包括一稀釋步驟,其中該反應器壓 力係自反應物給料步驟中之壓力增加,及一移除或抽除步 驟’其壓力係降低至低於反應物給料步驟期間之壓力。 使用此等特色,可得到以下效果。 1 ·各反應物之給料步驟係與分壓及時間有關(如Langmuire 所説明之反應物曝露相依性)。是故,藉著於反應物給料 期間增加所提供之反應物的分壓,則可縮短處理時間。 (請先閲讀背面之注意事項再填寫本頁) -ϋ^ I I n^i m m Γϋ ϋ— sal m 1 J —ϋ am -Order 593736 Consumption cooperation with employees of the Central Bureau of Standards of the Ministry of Economic Affairs print A7 B7 V. Description of the invention (12) <% gas dilutes non-chemically adsorbed reactants, and then pumps (removes) the non-chemically adsorbed reactants from the reactor And proceed. Secondly, a 200 sccm long-range plasma (400 watts) of NH3 was provided, and the non-chemically adsorbed reactant was diluted by 5000 sccmiN2 gas, and then the non-chemically adsorbed reactant was pumped (removed) from the reactor to complete the cleaning. . In this case, HCD was supplied to the reactor for 20 seconds. The reactor pressure was changed from 0.1 Torr to 2 Torr, and then maintained at 2 Torr. The pressure during washing was changed from 2 Torr to 10 Torr during the dilution step (4 seconds), and then reduced to 0.1 Torr during pumping (6 seconds). Providing NH3 (3 (^ >,) and pumping (4 + 6 seconds) was performed using the aforementioned method. Figure 6 illustrates the results of the aforementioned ALD method. The growth rate was 2.3 Angstroms / cycle, and good ALD processing characteristics were obtained The characteristics of the present invention are as follows: 1. The reactor pressure during the feeding step and the pumping step may be different. 2. The reactor pressure of different reactants at each feeding step may be substantially the same or different. 3. It can be found that the pumping step includes a dilution step, wherein the reactor pressure is increased from the pressure in the reactant feeding step, and a removal or pumping step, whose pressure is reduced to a pressure lower than the pressure during the reactant feeding step Using these features, the following effects can be obtained: 1 · The feeding step of each reactant is related to the partial pressure and time (such as the dependency of the reactant exposure as described by Langmuire). Therefore, by increasing the reactant feeding period The partial pressure of the reactants provided can shorten the processing time. (Please read the precautions on the back before filling this page) -ϋ ^ II n ^ imm Γϋ ϋ — sal m 1 J —ϋ am-
、1T 線 -15- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X 297公釐) 593736 經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明(13) '' 2應保持定壓之習用則方法不同地,各反應物之仏 之壓:係於清洗之後完成。因此,可自較低壓力得到所需 3·當孩清洗係於具有大型體積之反應器内進行時, 加U丨生氣體,以稀釋該反應物。之後,進行泵抽,以於 周期時間内得到所需之清洗效果。 、a 總足,本發明提供許多優於習用ALD技術之優點,克服 〃午多習用ALD技術之缺點。例如,本發明大幅增加該ald 方法之通量。尤其,根據本發明較佳具體實例,因爲本發 明之爐型ALD反應器具有大型體積而未分隔之單一反應空 間’故其一次可容裝且處理多於100片基材,實質上多於 任何其他習用ALD技術。而且,因爲單一ALD方法所使用 之所有產物晶圓皆可置入單一反應空間中,不分佈於一反 應器中之數個反應空間中,該基材批料之裝載/卸除可藉 自動晶圓輸送機構自動且迅速地完成。此外,非化學吸附 反應物係於自該反應空間移除非化學吸附反應物之前,於 單一反應2間中稀釋,該清洗時間可大幅縮短,而使清洗 效果最大化。 除此等優點之外,本發明ALD反應器較習用ALD反應器 平價且較易維修。因此,本發明ALD方法增加通量及產 能,以便可使用ALD進行大量生產。 使用較佳具體實例描述且説明本發明原理之後,已知本 發明可在不偏離該原理的情況之下,修飾其配置及細節。 吾人申請涵蓋於本發明精神及範圍内之修飾及變化。 -16- 本紙張尺度適用中國國家標準(CNS ) A4規格(210X297公釐〉 (請先閲讀背面之注意事項再填寫本頁) •裝· 訂 ·線1T line -15- This paper size applies to Chinese National Standard (CNS) A4 (210X 297 mm) 593736 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 5. Invention Description (13) '' 2 should be kept fixed The conventional method of pressure is different. The pressure of each reactant is completed after washing. Therefore, the required pressure can be obtained from a lower pressure. 3. When the cleaning is carried out in a reactor with a large volume, U? Gas is added to dilute the reactant. After that, the pump is pumped to obtain the desired cleaning effect within the cycle time. In general, the present invention provides many advantages over the conventional ALD technology, and overcomes the shortcomings of the conventional ALD technology at noon. For example, the present invention significantly increases the throughput of the ald method. In particular, according to the preferred embodiment of the present invention, because the furnace-type ALD reactor of the present invention has a large volume without a single reaction space, it can hold and process more than 100 substrates at a time, substantially more than any Other conventional ALD technologies. Moreover, because all product wafers used in a single ALD method can be placed in a single reaction space and not distributed among several reaction spaces in a reactor, the loading / unloading of the substrate batch can be performed by automatic crystallisation. The round conveying mechanism is completed automatically and quickly. In addition, the non-chemically adsorbed reactants are diluted in a single reaction room 2 before the non-chemically adsorbed reactants are removed from the reaction space, and the cleaning time can be greatly shortened to maximize the cleaning effect. In addition to these advantages, the ALD reactor of the present invention is cheaper and easier to maintain than conventional ALD reactors. Therefore, the ALD method of the present invention increases throughput and productivity so that ALD can be used for mass production. After describing and explaining the principle of the present invention using preferred specific examples, it is known that the present invention can modify its configuration and details without departing from the principle. My application covers modifications and variations that fall within the spirit and scope of the invention. -16- This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling this page) • Binding, Binding, Threading
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JP4167411B2 (en) | 2008-10-15 |
CN1312757C (en) | 2007-04-25 |
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JP2002367992A (en) | 2002-12-20 |
KR100417893B1 (en) | 2004-02-11 |
DE10132882A1 (en) | 2002-12-05 |
CN1389910A (en) | 2003-01-08 |
US20030013320A1 (en) | 2003-01-16 |
DE10132882B4 (en) | 2005-04-14 |
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